Even if you have been signing W-9s or 1099s this way or that, if you have have been signing checks 'in blank' then that is likely why they are coming after you. More than likely you did do anything to safeguard yourself against liabilities particular to the driver license that you provided when you cashed the check. Likely a social security number is associated with the driver license. Likely a birth certificate is associated with the driver license. No doubt, the IRS is fully aware of the link between the DL and the SS#.
Point being, you're better off figuring out who or what you are and finding a way to resolve the tax liability to the IRS.
Consider this maxim which I have muchly adhered to:
When in doubt, do not act.
It is likely that they provide lots and lots of disclosure (see photo). Whether you have been too busy to pour over the terms and conditions is something that they might not care much about. Likely, they presume that you know every single letter and word and phrase.
Plenty of disclosure. Just not much on Redbox, Netflix or the TV.
When you doubt, do not act.
It is a fault to meddle with what does not belong to or does not concern you.
Many men know many things, no one knows everything.
One is not present unless he understands.
It avails little to know what ought to be done, if you do not know how it is to be done.
He who questions well, learns well.
What ever is done in excess is prohibited by law.
No one is bound to give information about things he is ignorant of, but every one is bound to know that which he gives information about.
No man is bound to have foreknowledge of a Divine or a future event.
No one is bound to arm his adversary.